Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a96dd543be5ed7…

MALICIOUS

PDF

84.3 KB Created: 2021-08-02 19:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c1e8431ad001c93c3dd1720c34ba3b3e SHA-1: c0f1ca1b791fcc4a409ffb402558678851a01f0c SHA-256: 01a96dd543be5ed75ffe94803233dacbd0c9e8f830f0aa833804defbd376d649
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many hosted on compromised CMS platforms, suggesting an attempt to redirect users to download malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to T1059.007, and the overall lure mechanism aligns with T1566.001.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=mini+militia+unlimited+nitro+apk+free+download PDF link annotation
    • https://angelsstaff.com/uploads/file/xewuset.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/zipofupofivizogotop.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/61f7b5d6695e2ed953d08604426ab28f/xemab.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a59b6dee1a2---wabagivoboxenolozuvan.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/golokodirejufidib.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/o4o0vhphnumc6t7n9nesbgfqd1/55853914198.pdfIn PDF document text
    • http://rilta.net/userfiles/files/zenete.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/de9623e0920d6268e66e2ee221af48be/wazifuwuve.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/tukiveliremimizatikajewu.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc4f1dc0a5---lusixipomawevodolabobov.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/c8334b0f46049a1a33d8161260825a4c/piremugesalu.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/89832147768.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160732cab0bf60---puzufatawarazemeru.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/13970e7c360803e985a5bb6fbc283b67/30824689518.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160987f2bedc15---394758923.pdfIn PDF document text
    • http://theonejsc.com/userfiles/file/54667679896.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c3212d24c---98347718853.pdfIn PDF document text
    • https://sinarwaja.com/account/files/pafarapirep.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160bcca2f73a2e---gelumomufabo.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/gubutixuwip.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fad5804008---gaxetegexawatib.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/54724161299.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/64972079743.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/79437946141.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/nezipen.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F4 18772 bytes
SHA-256: 98973e9fdd4e97162085808c082ffc41cd432fdecb361234535a00b5470d5d6b
font_02_sfnt_off0001294e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294E 10764 bytes
SHA-256: e62dc75827486c16f0f52fbf4985edc07a4ef6b171b5809106b55cc205b5633a

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